1988 Monte Carlo LS Street Car Build Thread

S

scoti

Greasemonkey
Sep 5, 2019
150
43
Texas
These headers are designed for the roundy round guys. They are a basic design common to Schoenfeld and Dynatech. These headers can be had for as little as 150 bucks or so in mild steel. With these, the headers will protrude about 1 1/2 or 2 inch into and 2-3 inch from the front of the AC box where the aluminum tube comes into the box for the evaporator. While all this is on the one half of the box, it was more then I wanted to play around with. The pictures do not give a real accurate reference. There is a easy hands width between the top of the tubes and the box. I may try to use some header wrap here since they are basically paired in this area. Over all, there are about 4 hours in this modification including cutting, fitting and throwing it back in the car for one final test fit before purging and final welding.

For some reason, there is a lack of affordable single piece 1 3/4 inch headers on the market for these cars despite being such a popular build. Additionally, the ones available do not have 3 1/2 inch collectors like these.
How is plug clearance? I have AFR 190's & the full length 1 5/8 headers I mocked up on them had the #5 plug touching the tube (not the plug boot, the plug tip). All other cylinders appeared to have adequate clearance between the plug tip & tubes.

The SS headers I was looking @ are 304 material which I have access to for bends & straight pieces to tweak. But, like you mentioned, for the $$ it might be better to tweak a set like these. The difference will be how low they are beyond the frame rail though for me since the car I'm working on is fairly low (2" spindle & 1" spring up front).
 
Firetruck1

Firetruck1

Greasemonkey
Nov 1, 2017
193
63
Plug clearance is killer. I also have AFR 190 (L98 old school set from early 2000's) and they all have great access from what I remember. I will see about them now that we have moved a tube but they cant be as bad as others are. As for fitment, I believe the collectors are parallel with the bottom of the frame rail.
 
S

scoti

Greasemonkey
Sep 5, 2019
150
43
Texas
Plug clearance is killer. I also have AFR 190 (L98 old school set from early 2000's) and they all have great access from what I remember. I will see about them now that we have moved a tube but they cant be as bad as others are. As for fitment, I believe the collectors are parallel with the bottom of the frame rail.
I've had my AFR's since 02-03. I know the headers I tested were used on a A-body (71 Camino). They were parts of the 'gifted parts' I received (406 w/stock internals/Dart heads/Eddy Perf RPM Q-jet intake). I'm going to check the clearance against a set of Headman 3/4 length later this week.

Good to know about the collector height as well. I need them even or above the rails. Thanks for the info.
 
Firetruck1

Firetruck1

Greasemonkey
Nov 1, 2017
193
63
The motor is finally together, long block assembled and ready to go on the test stand. I have my lifters on the way directly from Edelbrock and a new set of rockers coming from Scorpion.

From there, I will throw the engine on the test stand and break it in and then it goes in the Monte for good.

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